Steel rollers are heavy, they rust, and every time you replace one it's a maintenance headache. Nylon conveyor rollers solve all three problems, and they're cheaper to boot. But machining nylon isn't like machining metal -- the stuff deflects, it absorbs coolant, and if you run the wrong cutter geometry you'll get a melted mess instead of a clean roller.

Nylon 6/6 (PA66) is the workhorse for conveyor rollers. It's tough, wears well against steel frames, and handles temperatures up to about 80C continuous. For food processing or wet environments, we switch to Acetal/Delrin because nylon absorbs moisture and swells -- a roller that was 50.00mm dry becomes 50.08mm after a week in a washdown environment. That 0.08mm might not sound like much until your conveyor belt starts tracking sideways.

The real trick to machining conveyor rollers is maintaining concentricity. A roller that's 300mm long needs both ends to be concentric within 0.05mm, otherwise you get vibration that tears up the conveyor belt. We turn between centers using live centers on the tailstock, which keeps the workpiece supported and eliminates the deflection you'd get with a chuck-only setup. Cycle time for a 300mm nylon roller on our CNC lathe is about 4 minutes -- rough the OD, finish turn, groove the bearing seats, face both ends, part off.

One thing that surprises people: nylon rollers are often quieter than steel, but not always. If the surface finish is too smooth (Ra 0.4 or below), the belt can't grip properly and you get squealing. We aim for Ra 1.6-3.2 on the rolling surface -- enough texture for belt traction without being abrasive. For specific grip requirements, we can add a diamond-knurl or herringbone groove pattern.

• Nylon 6/6 (PA66): High wear resistance, low friction coefficient, impact toughness suitable for heavy loads and continuous operation
• Delrin Option Available: For moisture-critical environments where nylon's water absorption would cause dimensional instability
• Concentricity Control: Turned between centers with live tailstock, total runout within 0.05mm on rollers up to 600mm length
• Bearing Seat Precision: Bore tolerance H7 for standard bearing fit, with optional press-fit or slip-fit geometry
• Surface Finish Optimized: Ra 1.6-3.2 on rolling surface for belt traction, Ra 0.8 on bearing seats for accurate fit
• Custom Groove Patterns: Diamond knurl, herringbone, straight groove, or plain surface available for specific belt traction requirements

• Package Handling: Conveyor rollers for logistics centers, distribution warehouses, and parcel sorting systems
• Food Processing: Washdown-rated Delrin rollers for food-grade conveyors, food-contact compliant material options
• Mining & Aggregate: Tough nylon rollers for bulk material handling, resistant to abrasion and impact
• Airport Baggage: Low-noise nylon rollers for baggage handling systems where quiet operation matters
• Assembly Lines: Precision rollers for automotive and electronics assembly conveyors with tight positioning requirements
• Agriculture: Corrosion-resistant nylon rollers for grain elevators, seed processing, and fertilizer handling

• Between-Centers Turning: We don't cut corners -- literally. Every roller is turned between centers with live tailstock support, which is the only reliable way to hold 0.05mm runout on a 600mm roller
• Plastic Machining Focus: Dedicated cutting parameters, coolant strategies, and tool geometries for engineering plastics -- not an afterthought on a metal-focused shop floor
• Material Expertise: We stock Nylon 6/6, Nylon 6, Delrin, and UHMW in standard sizes. We'll advise on the right material for your application, not just what's cheapest
• Volume Capability: Multi-spindle and multi-axis turning for high-volume roller production, consistent quality from piece 1 to piece 50,000
• Custom Profiles: Non-standard groove patterns, tapered rollers, crowned rollers, multi-diameter rollers -- if it's cylindrical (or nearly so), we can turn it
• Assembly Option: We can press-fit bearings, install shafts, and assemble complete roller units so you receive a ready-to-install component

1. Material Selection: Confirm nylon grade based on load, speed, temperature, and moisture exposure. Cut round bar stock to blank length with saw allowance
2. CNC Turning: Mount between centers, rough turn OD, finish turn to final diameter with surface finish control, turn bearing seat bores (if applicable), face both ends, cut any groove patterns, part off
3. Secondary Machining: Drill and tap axle holes, mill keyways or set screw flats on secondary operations (mill or drill press)
4. Deburring: Remove machining burrs from ends and grooves, nylon deburrs differently from metal -- heat-sensitive, so low-speed deburring tools only
5. Dimensional Inspection: Check diameter, length, runout (TIR), bore size, groove depth. For tight-tolerance orders, 100% inspection; for volume, SPC sampling
6. Packaging: Individually wrapped to prevent surface damage during shipping, bulk cartons with dividers, custom label with material grade and part number

Q: Nylon or Delrin -- how do I choose for a conveyor roller? A: If your environment is dry and room temperature, nylon is the better choice -- it's tougher and cheaper. If there's moisture, washdown, or high humidity, go with Delrin because it doesn't absorb water and won't swell. Nylon can grow 1-2% in dimension when fully saturated, which is enough to affect bearing fits and belt tracking.

Q: Can you make crowned rollers (barrel-shaped) for belt tracking? A: Absolutely. Crowned rollers are common on center-driven conveyors to help the belt track straight. We program the crown profile directly into the CNC turning cycle -- typically a 0.5-1mm crown on a 100mm diameter roller. You just need to tell us the crown radius or specify "1mm crown on diameter."

Q: What's the maximum roller length you can machine? A: Our longest between-centers setup handles up to 1,200mm. Beyond that, we'd need to look at a different approach -- maybe two-piece construction with a steel shaft and nylon sleeves. That's actually a common solution for very long conveyors.

Q: Do nylon rollers handle heavy loads? A: Nylon 6/6 has a compressive strength around 100 MPa, which translates to roughly 500kg load capacity on a 50mm diameter roller at 200mm span. For heavier loads, we'd either increase the diameter, add a steel core, or switch to a reinforced nylon (glass-filled). Glass-filled nylon roughly doubles the load capacity but machines harder and costs more.

Q: Can you add bearings and shafts before shipping? A: Yes. We stock standard 6200-series deep groove ball bearings and can press-fit them into the bearing seats. Shafts are either customer-supplied or we source them. Assembled rollers ship as complete units -- just drop them into the conveyor frame.

Q: How does nylon hold up in cold environments? A: Nylon gets brittle below about -20C. If your conveyor operates in a freezer or cold storage, Delrin is better -- it stays ductile down to -40C. UHMW-PE is another option for very cold environments, though it's softer and has lower load capacity than either nylon or Delrin.